[time-nuts] ground plane for cheap helix antennas?

Azelio Boriani azelio.boriani at gmail.com
Fri Jul 24 08:53:25 EDT 2015


You can try to build a poor man's choke ring:
<http://www.mauve.gr/var/DIY_Choke_Ring_GPS_Antenna.htm>

On Thu, Jul 23, 2015 at 7:38 PM, Alan Ambrose <alan.ambrose at anagram.net> wrote:
> Hi, is there any benefit in adding a ground plane to these simple timing antennas? e.g. GPS-TMG-26N
>
> http://www.antenna.com/apg_products.cgi?id_num=11740
>
> In which case, how big? And I'm imagining immediately underneath the antenna? This ublox note suggests probably not?
>
> http://www.u-blox.com/images/downloads/Product_Docs/GPS_Antennas_ApplicationNote%28GPS-X-08014%29.pdf
>
> The 58503A sitting on this atm gets '4.3us/initial 24 hours' prediction although I have seen it around 2.2us. Also max ~110 'SS'.
>
> Also is it helpful to increase the elevation mask?
>
> TIA, Alan
>
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